原子核多重碎裂中同位旋相分比的产生机理研究

On the mechanism of the Isospin fractionation in nuclear multifragmentation

利用非对称核物质状态方程及同位旋相关的量子分子动力学 (IQMD)模型对中能重离子碰撞中的同位旋相分比 (isospinfractionation)现象进行了研究 .给出了同位旋相分比现象的一种静态解释 .并详细分析了各种动力学因素对同位旋相分比的影响 .同时 。

The isospin fractionation in heavy-ion collisions is investigated using a static method and an isospin-dependent quantum molecular dynamics (IQMD) model. A static interpretation of the isospin fractionation is provided based on a phenomenological asymmetric nuclear equation of state. The effects of different dynamic ingredients on the isospin fractionation, i. e. symmetry potential, Coulomb potential and isospin dependence of N-N cross section, are discussed in the frame of IQMD model.